Linus Torvalds writes: (Summary)
So it might actually be even better with _two_ bits: "explicitly needs
RSB stuffing" and "explicitly fixed and does _not_ need RSB stuffing".
And then if neither bit it set, we fall back to the implicit "we know
Skylake needs it".
Skylake needs it".
If both bits are set, we just go with a "CPU is batshit schitzo" message, and assume it needs RSB stuffing just because it's obviously broken.
broken.
Linus
Linus
Linus
Skylake needs it".
If both bits are set, we just go with a "CPU is batshit schitzo" message, and assume it needs RSB stuffing just because it's obviously broken.
broken.
Linus
Linus
Linus